Analysis of Temperature-to-Polarization Leakage in BICEP3 and Keck CMB Data from 2016 to 2018

T. St. Germaine; P. A. R. Ade; Z. Ahmed; M. Amiri; D. Barkats; R. Basu Thakur; C. A. Bischoff; J. J. Bock; H. Boenish; E. Bullock; V. Buza; J. R. Cheshire IV; J. A. Connors; J. Cornelison; M. Crumrine; A. Cukierman; E. Denison; M. Dierickx; L. Duband; M. Eiben; S. Fatigoni; J. P. Filippini; S. Fliescher; N. Goeckner-Wald; D. C. Goldfinger; J. A. Grayson; P. Grimes; G. Hall; M. Halpern; S. A. Harrison; S. Henderson; S. R. Hildebrandt; G. C. Hilton; J. Hubmayr; H. Hui; K. D. Irwin; J. Kang; K. S. Karkare; E. Karpel; S. Kefeli; S. A. Kernasovskiy; J. M. Kovac; C. L. Kuo; K. Lau; E. M. Leitch; K. G. Megerian; L. Minutolo; L. Moncelsi; Y. Nakato; T. Namikawa; H. T. Nguyen; R. O'brient; R. W. Ogburn IV; S. Palladino; N. Precup; T. Prouve; C. Pryke; B. Racine; C. D. Reintsema; S. Richter; A. Schillaci; B. L. Schmitt; R. Schwarz; C. D. Sheehy; A. Soliman; B. Steinbach; R. Sudiwala; G. P. Teply; K. L. Thompson; J. E. Tolan; C. Tucker; A. D. Turner; C. Umiltà; A. G. Vieregg; A. Wandui; A. C. Weber; D. V. Wiebe; J. Willmert; C. L. Wong; W. L. K. Wu; E. Yang; K. W. Yoon; E. Young; C. Yu; L. Zeng; Cheng Zhang; S. Zhang

doi:10.1117/12.2562729

15 December 2020 Analysis of Temperature-to-Polarization Leakage in BICEP3 and Keck CMB Data from 2016 to 2018

T. St. Germaine, P. A. R. Ade, Z. Ahmed, M. Amiri, D. Barkats, R. Basu Thakur, C. A. Bischoff, J. J. Bock, H. Boenish, E. Bullock, V. Buza, J. R. Cheshire IV, J. A. Connors, J. Cornelison, M. Crumrine, A. Cukierman, E. Denison, M. Dierickx, L. Duband, M. Eiben, S. Fatigoni, J. P. Filippini, S. Fliescher, N. Goeckner-Wald, D. C. Goldfinger, J. A. Grayson, P. Grimes, G. Hall, M. Halpern, S. A. Harrison, S. Henderson, S. R. Hildebrandt, G. C. Hilton, J. Hubmayr, H. Hui, K. D. Irwin, J. Kang, K. S. Karkare, E. Karpel, S. Kefeli, S. A. Kernasovskiy, J. M. Kovac, C. L. Kuo, K. Lau, E. M. Leitch, K. G. Megerian, L. Minutolo, L. Moncelsi, Y. Nakato, T. Namikawa, H. T. Nguyen, R. O'brient, R. W. Ogburn IV, S. Palladino, N. Precup, T. Prouve, C. Pryke, B. Racine, C. D. Reintsema, S. Richter, A. Schillaci, B. L. Schmitt, R. Schwarz, C. D. Sheehy, A. Soliman, B. Steinbach, R. Sudiwala, G. P. Teply, K. L. Thompson, J. E. Tolan, C. Tucker, A. D. Turner, C. Umiltà, A. G. Vieregg, A. Wandui, A. C. Weber, D. V. Wiebe, J. Willmert, C. L. Wong, W. L. K. Wu, E. Yang, K. W. Yoon, E. Young, C. Yu, L. Zeng, Cheng Zhang, S. Zhang

Author Affiliations +

Proceedings Volume 11453, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X; 114532E (2020) https://doi.org/10.1117/12.2562729
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

The Bicep/Keck Array experiment is a series of small-aperture refracting telescopes observing degree-scale Cosmic Microwave Background polarization from the South Pole in search of a primordial B-mode signature. As a pair differencing experiment, an important systematic that must be controlled is the differential beam response between the co-located, orthogonally polarized detectors. We use high-fidelity, in-situ measurements of the beam response to estimate the temperature-to-polarization (T → P) leakage in our latest data including observations from 2016 through 2018. This includes three years of Bicep3 observing at 95 GHz, and multifrequency data from Keck Array. Here we present band-averaged far-field beam maps, differential beam mismatch, and residual beam power (after filtering out the leading difference modes via deprojection) for these receivers. We show preliminary results of "beam map simulations," which use these beam maps to observe a simulated temperature (no Q/U) sky to estimate T → P leakage in our real data.

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T. St. Germaine, P. A. R. Ade, Z. Ahmed, M. Amiri, D. Barkats, R. Basu Thakur, C. A. Bischoff, J. J. Bock, H. Boenish, E. Bullock, V. Buza, J. R. Cheshire IV, J. A. Connors, J. Cornelison, M. Crumrine, A. Cukierman, E. Denison, M. Dierickx, L. Duband, M. Eiben, S. Fatigoni, J. P. Filippini, S. Fliescher, N. Goeckner-Wald, D. C. Goldfinger, J. A. Grayson, P. Grimes, G. Hall, M. Halpern, S. A. Harrison, S. Henderson, S. R. Hildebrandt, G. C. Hilton, J. Hubmayr, H. Hui, K. D. Irwin, J. Kang, K. S. Karkare, E. Karpel, S. Kefeli, S. A. Kernasovskiy, J. M. Kovac, C. L. Kuo, K. Lau, E. M. Leitch, K. G. Megerian, L. Minutolo, L. Moncelsi, Y. Nakato, T. Namikawa, H. T. Nguyen, R. O'brient, R. W. Ogburn IV, S. Palladino, N. Precup, T. Prouve, C. Pryke, B. Racine, C. D. Reintsema, S. Richter, A. Schillaci, B. L. Schmitt, R. Schwarz, C. D. Sheehy, A. Soliman, B. Steinbach, R. Sudiwala, G. P. Teply, K. L. Thompson, J. E. Tolan, C. Tucker, A. D. Turner, C. Umiltà, A. G. Vieregg, A. Wandui, A. C. Weber, D. V. Wiebe, J. Willmert, C. L. Wong, W. L. K. Wu, E. Yang, K. W. Yoon, E. Young, C. Yu, L. Zeng, Cheng Zhang, and S. Zhang "Analysis of Temperature-to-Polarization Leakage in BICEP3 and Keck CMB Data from 2016 to 2018", Proc. SPIE 11453, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X, 114532E (15 December 2020); https://doi.org/10.1117/12.2562729

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